weather

10:39 am

Sat February 11, 2012

Snow and Sleet Possible Sunday Morning

You may want to consider avoiding the roads tomorrow morning. The National Weather Service says a "wintry mix" of weather is in the forecast for much of Central and South Central Texas. The NWS says "no significant accumulations of ice or snow are expected" but that "model timing and precipitation amount uncertainties remain."

As a weakening upper level low ejects northeast into the region late tonight and Sunday, light rain will begin developing late tonight over the southern Edwards Plateau and Rio Grande Plains as Gulf moisture overruns a dry cold airmass.

As temperatures continue dropping towards sunrise, some of the rain will become mixed with sleet. After sunrise, the overrunning precipitation will spread as the disturbance moves across the region. Atmospheric forecast profiles show relatively dry air near the surface across the Hill Country and over northern portions of South Central Texas at the time of subfreezing temperatures Sunday morning.

Therefore, much of the Gulf moisture that overruns Sunday morning is expected to evaporate before reaching the ground, and no significant accumulations of ice or snow are expected at this time. As overrunning continues during the day, precipitation will become all rain by afternoon as temperatures rise above freezing.